Double date on odd post after update for Travelify theme

After update to wordpress 4.2.1 and Travelify 2.4.1. i get on my odd post a double date, any idea how I can change this ?

You can see it here: ackershof2.nl

Thanks

@BartP

The issue is in fact that you are making changes directly into style.css and are not using Child Theme for that. I see that you have just copied the entire stylesheet from the previous version and of course that causes problems with this update.

With the latest theme update I introduced markup that is verified by Schema.org making it more SEO friendlier but yur custom coding is not SEO friendly and you will get errors in Google Webmaster tools. Something that you should look into if you depend on SEO for traffic, if not you are food to go with this setup as well.